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Started By
Message
Yamaha F250 vs F300
Posted on 6/25/12 at 8:07 pm
Posted on 6/25/12 at 8:07 pm
Looking to repower my bay boat. I currently have a 2005 F250 with about 1200 hours. Max hp is 300 but the F300 mininum octane rating is 89 and the F250 is 87. My marina sells 87 octane. How much HP do you think the F300 will lose running 87? I know it wont hurt the motor but it will effect performance.
This post was edited on 6/25/12 at 8:08 pm
4
Posted on 6/25/12 at 8:35 pm to tipup
They only sell 87?
Posted on 6/25/12 at 9:03 pm to tipup
What kind of boat? And what's wrong with the motor you got? A new boat motor is not cheap...might as well replace the entire boat if you want to buy a brand new F300.
Posted on 6/25/12 at 9:07 pm to jordan21210
I thought the 250's required the higher octane also.
Posted on 6/25/12 at 9:07 pm to jordan21210
The marina sells 87 and diesel. Thats it.
A new motor is about 20k and I have an offer of 6500.00 for the old motor. Thats a lot cheaper than the boat new which is over 60k the way I have it rigged!
23ft BayBolt.
The older 250's require 89. The new 4.2l requires 87.
A new motor is about 20k and I have an offer of 6500.00 for the old motor. Thats a lot cheaper than the boat new which is over 60k the way I have it rigged!
23ft BayBolt.
The older 250's require 89. The new 4.2l requires 87.
This post was edited on 6/25/12 at 9:11 pm
Posted on 6/25/12 at 9:20 pm to tipup
Ive gotta 2011 F-250 and see no performance/RPM difference with 87 or premium gas......
You say your gettin 300 HP out of your F-250 ??
F-250, 15.25 x 19 prop max spin say 6,100
Member the F-300 prolly spins a say 15.5 x 21 prop or so so your RPMS wont be any higher.
What ya spinnin 8,000 Rpm's ??
You say your gettin 300 HP out of your F-250 ??
F-250, 15.25 x 19 prop max spin say 6,100
Member the F-300 prolly spins a say 15.5 x 21 prop or so so your RPMS wont be any higher.
What ya spinnin 8,000 Rpm's ??
Posted on 6/25/12 at 9:22 pm to Drop4Loss
wut?
Posted on 6/25/12 at 9:25 pm to Who Me
We only run 87 in all 4 of the f300s on the two boats I go out in
Posted on 6/25/12 at 9:35 pm to Drop4Loss
quote:
You say your gettin 300 HP out of your F-250 ??
quote:
What ya spinnin 8,000 Rpm's ??
What??? Max HP is 300 for the boat! I have a 250 on it now.
quote:
Ive gotta 2011 F-250 and see no performance/RPM difference with 87 or premium gas......
If you have a 4.2l you wont see any added performance on premium because the engine is designed to run on 87.
This post was edited on 6/25/12 at 9:36 pm
Posted on 6/25/12 at 9:40 pm to tipup
Why sell a motor with only 1200 hours on it? That isn't that many hours. I have double that on my 2001 optimax. I would say run your current motor till it gives you problems then worry with a new motor.
However if I were to get a new one like in your shoes I would get the max HP for my boat, so it would be the 300 for me. I have seen several that are run on 87 with no issues, other thant it likely voids the warranty.
However if I were to get a new one like in your shoes I would get the max HP for my boat, so it would be the 300 for me. I have seen several that are run on 87 with no issues, other thant it likely voids the warranty.
Posted on 6/25/12 at 9:55 pm to Da Hammer
quote:
I thought the 250's required the higher octane also.
Pretty sure they do. Not sure what year our F250 is, but the owner's manual says 93. I'm sure it won't hurt it to run a lower grade, but I always run what's recommended. Engine knock = engine death.
quote:
The marina sells 87 and diesel. Thats it.
A new motor is about 20k and I have an offer of 6500.00 for the old motor. Thats a lot cheaper than the boat new which is over 60k the way I have it rigged!
23ft BayBolt.
I recommend finding a new marina
I got ya though. I still would just run what ya got until it won't run any more. I doubt you'll notice the extra 50hp, and fuels savings would more than likely cancel out with the bigger motor...that's assuming it can run lower grade gas in the first place.
ETA: I'm not mechanic, but I know a little about engines...and I'm fairly certain running 87 in the 300 could hurt it over time as well as hurt your performance a bit. But like I said, I doubt you'd even notice the extra 50 hp.
quote:
Why sell a motor with only 1200 hours on it? That isn't that many hours. I have double that on my 2001 optimax. I would say run your current motor till it gives you problems then worry with a new motor.
I agree with this.
This post was edited on 6/25/12 at 9:57 pm
Posted on 6/25/12 at 10:03 pm to jordan21210
quote:
I doubt you'll notice the extra 50hp
I agree with everything in your post but this. Those 300's are getting great reviews and while I don't think it would be a mind blowing performance upgrade I do think it would be easily noticeable.
Posted on 6/25/12 at 10:04 pm to tipup
Per Yamaha's website the 4.2l requires 87.
Posted on 6/25/12 at 10:07 pm to Who Me
quote:
I agree with everything in your post but this. Those 300's are getting great reviews and while I don't think it would be a mind blowing performance upgrade I do think it would be easily noticeable.
Maybe so...
I haven't read any reviews on them.
But as far as cost vs. performance...which I know we both agree...I couldn't justify spending thousands more for 50 more hp when the 250 I have is running fine. Doesn't make much sense to me...
But like I said, I'm fairly certain we both agree there
Posted on 6/25/12 at 10:09 pm to tipup
quote:
Per Yamaha's website the 4.2l requires 87.
But is that for the current model?
Pretty sure I remember talking to a salesman a while back about the difference between the 225 and the 250. The salesman pretty much told me that a lot of people opt for the 225 cuz it only needed the 87 and not the higher octane like the 250. Maybe I'm mistaken.
Posted on 6/25/12 at 10:11 pm to Who Me
quote:
Pretty sure I remember talking to a salesman a while back about the difference between the 225 and the 250. The salesman pretty much told me that a lot of people opt for the 225 cuz it only needed the 87 and not the higher octane like the 250. Maybe I'm mistaken.
Yeah, I remember reading it specifically in the manual. IIRC, my dad was putting 87 or 89 in ours and asked me if that was right...so, not being sure, I checked the manual and am pretty certain it recommended 93 but 89 is acceptable as well.
Posted on 6/25/12 at 10:13 pm to jordan21210
quote:
But like I said, I'm fairly certain we both agree there
Yeah. You know how I stand on that as I push the same boat as you guys but with a 150.
But when I was picking up my boat another guy as picking up a 24 footer with the 300 for almost twice what my boat cost. So at that point when guys are spending that much money they want the best, which I can understand.
I don't have that luxury.
Posted on 6/26/12 at 9:57 am to Who Me
I can't imagine upgrading a perfectly good F250 with that low of hours. But the F300 is quite nice and is about 50 or so pounds lighter too.
Posted on 6/26/12 at 10:05 am to tipup
quote:
octane rating is 89 and the F250 is 87. My marina sells 87 octane.
Don't tell your motor she's getting 87 in lieu of 89 and she'll never know.
and FYI, i put diesel in my F250.
This post was edited on 6/26/12 at 10:05 am
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